<%if (css === 'less') {-%>
@max-size: 30;
@min-size: 12;

.font-size(@i) when (@i <= @max-size) and (@i >= @min-size) {
  .fs-@{i} {
    font-size: @i * 1px;
  }

  .font-size(@i - 2);
}

.font-size(@max-size);

<%} else if (css === 'scss') { -%>
$font-size: 50;

@for $size from 0 through $font-size {
  @if $size % 2 == 0 and $size >= 10 {
    .fs-#{$size} {
      font-size: $size * 1px;
    }
  }
}
<%}-%>
